/*
 *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree. An additional intellectual property rights grant can be found
 *  in the file PATENTS.  All contributing project authors may
 *  be found in the AUTHORS file in the root of the source tree.
 */

#ifndef WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_H_
#define WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_H_

#include "acm_generic_codec.h"

namespace webrtc {

struct ACMISACInst;

enum iSACCodingMode {
  ADAPTIVE,
  CHANNEL_INDEPENDENT
};

class ACMISAC : public ACMGenericCodec {
 public:
  ACMISAC(WebRtc_Word16 codecID);
  ~ACMISAC();
  // for FEC
  ACMGenericCodec* CreateInstance(void);

  WebRtc_Word16 InternalEncode(WebRtc_UWord8* bitstream,
                               WebRtc_Word16* bitStreamLenByte);

  WebRtc_Word16 InternalInitEncoder(WebRtcACMCodecParams *codecParams);

  WebRtc_Word16 InternalInitDecoder(WebRtcACMCodecParams *codecParams);

  WebRtc_Word16 DeliverCachedIsacData(WebRtc_UWord8* bitStream,
                                      WebRtc_Word16* bitStreamLenByte,
                                      WebRtc_UWord32* timestamp,
                                      WebRtcACMEncodingType* encodingType,
                                      const WebRtc_UWord16 isacRate,
                                      const WebRtc_UWord8 isacBWestimate);

  WebRtc_Word16 DeliverCachedData(WebRtc_UWord8* /* bitStream */,
                                  WebRtc_Word16* /* bitStreamLenByte */,
                                  WebRtc_UWord32* /* timestamp */,
                                  WebRtcACMEncodingType* /* encodingType */) {
    return -1;
  }

  WebRtc_Word16 UpdateDecoderSampFreq(WebRtc_Word16 codecId);

  WebRtc_Word16 UpdateEncoderSampFreq(WebRtc_UWord16 sampFreqHz);

  WebRtc_Word16 EncoderSampFreq(WebRtc_UWord16& sampFreqHz);

  WebRtc_Word32 ConfigISACBandwidthEstimator(
      const WebRtc_UWord8 initFrameSizeMsec,
      const WebRtc_UWord16 initRateBitPerSec, const bool enforceFrameSize);

  WebRtc_Word32 SetISACMaxPayloadSize(const WebRtc_UWord16 maxPayloadLenBytes);

  WebRtc_Word32 SetISACMaxRate(const WebRtc_UWord32 maxRateBitPerSec);

  WebRtc_Word16 REDPayloadISAC(const WebRtc_Word32 isacRate,
                               const WebRtc_Word16 isacBwEstimate,
                               WebRtc_UWord8* payload,
                               WebRtc_Word16* payloadLenBytes);

 protected:
  WebRtc_Word16 DecodeSafe(WebRtc_UWord8* bitStream,
                           WebRtc_Word16 bitStreamLenByte, WebRtc_Word16* audio,
                           WebRtc_Word16* audioSamples,
                           WebRtc_Word8* speechType);

  WebRtc_Word32 CodecDef(WebRtcNetEQ_CodecDef& codecDef,
                         const CodecInst& codecInst);

  void DestructEncoderSafe();

  void DestructDecoderSafe();

  WebRtc_Word16 SetBitRateSafe(const WebRtc_Word32 bitRate);

  WebRtc_Word32 GetEstimatedBandwidthSafe();

  WebRtc_Word32 SetEstimatedBandwidthSafe(WebRtc_Word32 estimatedBandwidth);

  WebRtc_Word32 GetRedPayloadSafe(WebRtc_UWord8* redPayload,
                                  WebRtc_Word16* payloadBytes);

  WebRtc_Word16 InternalCreateEncoder();

  WebRtc_Word16 InternalCreateDecoder();

  void InternalDestructEncoderInst(void* ptrInst);

  WebRtc_Word16 Transcode(WebRtc_UWord8* bitStream,
                          WebRtc_Word16* bitStreamLenByte, WebRtc_Word16 qBWE,
                          WebRtc_Word32 rate, bool isRED);

  void CurrentRate(WebRtc_Word32& rateBitPerSec);

  void UpdateFrameLen();

  bool DecoderParamsSafe(WebRtcACMCodecParams *decParams,
                         const WebRtc_UWord8 payloadType);

  void SaveDecoderParamSafe(const WebRtcACMCodecParams* codecParams);

  ACMISACInst* _codecInstPtr;
  bool _isEncInitialized;
  iSACCodingMode _isacCodingMode;
  bool _enforceFrameSize;
  WebRtc_Word32 _isacCurrentBN;
  WebRtc_UWord16 _samplesIn10MsAudio;
  WebRtcACMCodecParams _decoderParams32kHz;
};

}  // namespace

#endif  // WEBRTC_MODULES_AUDIO_CODING_MAIN_SOURCE_ACM_ISAC_H_
